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| Registros recuperados: 136 | |
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| Ubertini, Martin; Lagarde, Franck; Mortreux, Serge; Le Gall, Patrik; Chiantella, Claude; Fiandrino, Annie; Bernard, Ismael; Pouvreau, Stephane; Roque D'Orbcastel, Emmanuelle. |
| The Thau lagoon, located at the South of France, provides 10% of the French pacific oyster Crassostrea gigas production. Despite this intensive shellfish production, the larval recruitment of this species within the Thau lagoon is still misunderstood and spat collection remains highly variable; as a consequence, shellfish farmers rely mostly on hatchery”s spat. The present study aimed to describe reproduction features of C. gigas within the Mediterranean, as well as to explore spawning triggers of this species. To achieve this goal, the reproduction cycle from gametogenesis to spawning was followed during two years in several locations within the Mediterranean Thau lagoon. The spawning behavior of C. gigas within the Thau lagoon appeared to be slightly... |
| Tipo: Text |
Palavras-chave: Mollusc physiology; Spawning triggers; Oysters. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00369/48032/48118.pdf |
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| Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Hawkins, A. J. S.; Thiriot Quievreux, Catherine; Wilkinns, N. P.; Zouros, Eleftherios; Bonhomme, Francois. |
| The EEC project "Genephys 1996-2000", initiated by the IFREMER laboratory GAP (Génetique, Aquaculture et Pathologie, La Tremblade and CREMA (Centre de Recherche en Ecologie Marine et Aquaculture, l'Houmeau), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main objectives are: 1- To express the maximum variability of growth, both at the larval stage and at the adult stage, in an oyster population originating from parents of various origins. 2- To check the persistence over the time, of growth performance and related physiological functions. 3-... |
| Tipo: Text |
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Absorption efficiency; Growth; Oysters; Crassostrea gigas. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00050/16149/13632.pdf |
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| Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Hawkins, A. J. S.; Thiriot Quievreux, Catherine; Wilkins, N. P.; Zouros, Eleftherios; Bonhomme, Francois; Buestel, Dominique; Samain, Jean-francois. |
| The UE project "GENEPHYS", initiated by the IFREMER laboratory GAP-La Tremblade (Génétique Aquaculture et Pathologie) and CREMA-L'Houmeau (Centre de Recherche en Ecologie marine et Aquaculture), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main objectives are : 1. To express the maximum variability of growth, both at the larval stage and at the adult stage, in a oyster population originating from parents of various origins. 2. To check the persistence over the time, of growth performance and related physiological functions. 3. To explain... |
| Tipo: Text |
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Absorption efficiency; Growth; Oysters; Crassostrea gigas. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00050/16150/13633.pdf |
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| Gerard, Andre; Boudry, Pierre; Bougrier, Serge; Buestel, Dominique; Samain, Jean-francois; Hawkins, A. J. S.; Wilins, N.; Zouros, Eleftherios; Bonhomme, Francois; Thiriot Quievreux, Catherine. |
| The EU project "GENEPHYS", initiated by the IFREMER laboratory GAP-La Tremblade (Génétique Aquaculture et Pathologie) and CREMA-l'Houmeau (Centre de Recherche en Ecologie Marine et Aquaculture), aims to establish the relationships between physiological traits involved in growth (oxygen consumption, absorption efficiency, scope for growth) and their genetic bases (determinism, variability within and among populations) in cupped oyster Crassostrea gigas. The main bjectives are : 1. To express the maximum variability of growth, both at the larval stage and at the adult stage, in a oyster population originating from parents of various origins. 2. To check the persistence over the time, of growth performance and related physiological functions. 3. To explain... |
| Tipo: Text |
Palavras-chave: Genetic; Determinism; Variability; Physilogy; Oxygen consumption; Growth; Absorption efficiency; Oysters; Crassostrea gigas. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00050/16151/13634.pdf |
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| Boudry, Pierre; Barre, Marc; Gerard, Andre. |
| Despite the economic importance of shellfish, genetic improvement has not yet had a great impact on these species. Shellfish farming is traditionally based on wild species whose natural populations are often overexploited and do not fulfill market demand. Up to now, the most effective answer to disease problems or for the improvement of productivity has been the introduction of new species. However, the introduction of new species is constrained by their ecological impact and is also limited by the availability of suitable species. Genetic improvement of local species should therefore be of great importance as a viable alternative for the long term sustainability of the shellfish industry. The different approaches to genetic improvement include... |
| Tipo: Text |
Palavras-chave: Selective breeding; Hybridization; Polyplidy; Introduction; Oysters; Selection; Hybridation; Polyploidie; Introduction; Huitres. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-3499.pdf |
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| Boudry, Pierre; Degremont, Lionel; Taris, Nicolas; Mccombie, Helen; Haffray, Pierrick; Ernande, Bruno. |
| The most significant genetic improvement for production of Pacific oyster (Crassastrea gigas) has been obtained through the breeding of triploids, especially since the development of tetraploids. Quantitative genetics studies suggest that significant gains, for disease resistance or for other traits of aquacultural interest, could be obtained using this approach. However, the limited extent of hatchery-propagation (versus natural recruitment) and/or various technical difficulties and biological characteristics of the species have slowed the development of selective breeding programs. Recently, in the USA, Australia and New Zealand, family-based selective breeding programs have been initiated to improve growth and yield. In Europe, where both natural and... |
| Tipo: Text |
Palavras-chave: Microsatellites; Quantitative genetic; Genetic variability; Crassostrea gigas; Oysters. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-2861.pdf |
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| Lapegue, Sylvie. |
| The development of fish and shellfish farming is facing several challenges linked to the infancy of the industry: i.e. domestication, genetic improvement of disease resistance, genetic improvement of feed efficiency to fish meal and fish oil substitution by vegetal products, development of adapted vaccines, supply of fry or spat at high quality and high robustness, adaptation to environmental change, production of healthy, high quality consumer products and limitation of environmental impact of the activity and escapees. Over recent years, the EU and individual countries have supported the development of genomic tools for some aquaculture species (e.g. rainbow trout, sea bass, sea bream, turbot pacific oyster, Atlantic salmon). New perspectives arise... |
| Tipo: Text |
Palavras-chave: Mussels; Oysters; Domestication; Genome mapping; Genetic. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/acte-3819.pdf |
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| Alderman, D. J.; Gras, Paul. |
| During April and May of this year, there has been a heavy mortality of Portuguese oysters, Crassostrea angulata LmK., which were imported into Britain from the River Tagus (Portugal) in March. Losses in some cases exceeded 90 per cent. The symptoms shown by the dyring oysters are the same as those seen in Britain and France in C. angulata in 1967 and 1968. Farley described the general symptoms in oysters (C. virginica Gmelin) dying of prolonged functional or infectious disease. These gross symtoms appear to be similar in the case of several different diseases including the present European mortality. |
| Tipo: Text |
Palavras-chave: Gill; Crassostrea angulata; Oysters. |
| Ano: 1969 |
URL: http://archimer.ifremer.fr/doc/1969/publication-5931.PDF |
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| Le Guyader, Soizick; Maalouf, Haifa; Le Pendu, Jacques. |
| Shellfish can be a vector for human pathogens. Despite regulation based on enteric bacteria, shellfish are still implicated in viral outbreaks. Oysters are the most common shellfish associated with outbreaks, and noroviruses, which cause acute gastroenteritis, are the most frequently identified pathogen in these outbreaks. Analysis of shellfish-related outbreak data worldwide shows an unexpected high proportion of genogroup I strains. Recent studies performed in vitro, in vivo and in the environment indicate that oysters are not just a passive filter, but can selectively accumulate norovirus strains based on virus carbohydrate ligands shared with humans. These observations may help explain the GI/GII bias observed in shellfish-related outbreaks compared to... |
| Tipo: Text |
Palavras-chave: Huîtres; Norovirus; Ligand; Sélection de souches; Oysters; Norovirus; Ligand; Strain selection. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00152/26357/24514.pdf |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Noiret, Christophe; Peudenier, Isabelle; Grizel, Henri. |
| For determination of ploidy levels in bivalves, three techniques are now routinely used: karyological determination. microfluorimetry and flow cytometry. This paper proposes an alternative technique which is based on determination of the optical density (OD) of stained nuclei using image analysis. A karyological and image analysis comparative experiment conducted on juveniles of Crassostrea gigas (Thunberg) and Ruditapes philippinarum (Adam & Reeve) is described and highlights the advantages of the image analysis technique. Initially developed on C. gigas and R. philippinarum, the image analysis method was easily extended to other bivalve species and to different developmental stages, as demonstrated by two experiments conducted on Ostrea edulis (L.).... |
| Tipo: Text |
Palavras-chave: Estimation bivalve triploidy; Image analysis; Triploid; Genetic; Crassostrea gigas; Oysters. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/publication-3200.pdf |
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| Dupuy, Christine; Pastoureaud, Annie; Ryckaert, Mireille; Sauriau, Pierre-guy; Montanie, Hélène. |
| To assess the in situ impact of oysters Crassostrea gigas on planktonic protist and bacteria communities and the potential contribution of protozoa to their food resource intake, the abundance and the diversity of protists and bacteria were followed in 2 Atlantic coastal ponds, with and without oysters. The protist biomass in such ponds was high, with a maximum in spring of 982 mug C l(-1) and a minimum in winter of 179 pg C l(-1). Whatever the season, the presence of oysters (20 m(-2) corresponding to an average of 23 mg dry weight m(-2)) induced a significant decrease in >5 pm protist abundance. On the contrary, planktonic organisms <5 pm, such as Chlorophyta flagellates and bacteria, developed similarly in both ponds. It can be assumed that such... |
| Tipo: Text |
Palavras-chave: Trophic link; Bacteria; Protists; Microbial food web; Coastal pond; Food source; Oysters; Bivalve. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-822.pdf |
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| Zurburg, Wouter; Smaal, Aad; Heral, Maurice; Dankers, Norbert. |
| The uptake and release of material by oysters (Crassostrea gigas) in the intertidal zone were estimated in situ in the Bay of Marennes-Oléron (France) in spring and autumn. 10 m long plexiglass tunnels were placed over small tables with bags containing oysters or empty oyster shells (control). Although in the very turbid conditions of the water column sedimentation of suspended particulate material could be observed in control experiments, higher fluxes (uptake) of seston, POC and PON and especially chlorophyll occurred in the presence of live animals. Release of dissolved nutrients was not evident from the tunnel with oysters, which is in contrast with studies in other areas with bivalves. This is ascribed to limited mineralization of biodeposits as an... |
| Tipo: Text |
Palavras-chave: Chlorophyll; Seston; Oysters; Nutrient release; Material uptake. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/publication-6842.PDF |
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| Boudry, Pierre; Collet, B; Mccombie, Helen; Ernande, Bruno; Morand, B; Heurtebise, Serge; Gerard, Andre. |
| In order to study individual growth variability and its relationship with survival in juvenile Crassostrea gigas, parental oysters were sampled at four sites located along the French Atlantic coast and bred under controlled hatchery conditions. Four groups of larvae were obtained by crossing five males and five females from each of the four sites, and a fifth group by crossing these 20 males and 20 females together in a pool. Larvae were reared under conditions allowing the maintenance of a maximum variability of size and gave five experimental groups. Oysters were individually monitored for growth and survival from 3 to 10 months after fertilization. The individual growth performances were relatively stable over time and no noticeable compensation for... |
| Tipo: Text |
Palavras-chave: Survival; Oysters; Growth; Crassostrea gigas; Aquaculture. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-467.pdf |
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| Polo, David; Schaeffer, Julien; Teunis, Peter; Buchet, Vincent; Le Guyader, Soizick. |
| Oysters, being filter feeders, can accumulate some human pathogens such as norovirus, a highly infectious calicivirus, most common cause of acute gastroenteritis worldwide. Accumulated virus decays over a period of days to weeks, possibly rendering contaminated oysters safe again. Sensitive molecular methods have been set up for shellfish analysis but without answering the question of infectious virus detection. Using the Tulane virus (TV), a norovirus surrogate that recognizes the same ligand as human norovirus in oyster tissues, the genome and infectious virus decay rates were estimated using inverse linear regression in a Bayesian framework for genome copies. Infectivity decreased faster than genome copies but infectious viruses were detected for... |
| Tipo: Text |
Palavras-chave: Infectious virus; Genome detection; Oysters; Persistence; Shellfish outbreaks. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00436/54736/56182.pdf |
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| Mazurie, Joseph; Le Mao, Patrick; Camus, Patrick; Bacher, Cedric; Goulletquer, Philippe. |
| Integration of shellfish farming along the French shoreline (around 5500 km) has been progressive, as marine bivalve culture is a traditional activity in our country. The history of mussel culture relates that the "bouchot" technique (intertidal culture on wooden poles, producing annually around 60,000 tons) was developed as early as the XIIIth century, by a refugee attempting to capture birds by sticking branches of brushwood along the shore. The European flat oyster, Ostrea edulis, already appreciated at the Roman period, was first cultivated in France after Victor Coste introduced the technique of spat collection at the end of the XIXth century. The Pacific cupped oyster, genus Crassostrea, now the most-cultivated in France (around 120,000 tons marketed... |
| Tipo: Text |
Palavras-chave: Trophic capacity; Trophic resource; Nature conservation; Coastal zone management; Biodiversity; Mytilus edulis; Mussels; Integration; Ostrea edulis; Crassostrea gigas; Oysters. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/acte-3400.pdf |
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| Registros recuperados: 136 | |
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